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View from a Scope | July 22, 2019

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What is the fastest-spinning star ever found?

A Hot blue star 25 times the mass of the sun, is the fastest-spinning star known. It is called VFTS 102 and it resides within the Tarantula Nebula. At its surface the star rotates at about 600km/s (more than 1 million mph). Although VFTS 102 is the fastest rotating ‘normal’ star, pulsars actually spin more quickly. Pulsars are the collapsed cores of stars that have gone supernova. The fastest spinning pulsar discovered is Ter5ad. It rotates 716 times a second, which means the rotation speed at its equator is about 158 million mph or about 24 per cent the speed of light.

Posted in: Stars